Fixed FireFox issue which showed multiple videos for the same peer.
Added information where to get session ID and secure session ID fixing  #128.
Also show the constraints as object in debugger.
Added settings to control audio and video constraints. Some settings were added as experiments which are disabled per default).
Fixed an issue where screen sharing is not started on a session which was already in the same conference before with already started screen sharing.
0.22.6
Removed audio mirror option as it does not seem to work in the wild.